World War 1 By Quentin 5752 Jun 28, 1914 June 28th The Assassination of Francis Ferdinand. Jul 28, 1914 • July 28th Austria Declared war on Serbia Aug 1, 1914 August 1st Germany declares war on Russia. Aug 4, 1914 August 4th Britain and allied countries such as Australia Declairs War on Germany two sides formed the allied powers and the central powers. May 23, 1915 1915- May 23rd Italy changed sides and declared war on Germany and Austria. 1915- May 23rd Italy changed sides and declared war on Germany and Austria. Dec 23, 1915 • December 23rd The allies started the evacuation from Gallipoli. Jan 27, 1916 January 27th Conscription introduced in Britain. Apr 29, 1916 April 29th British Forces Surrender To The Turkish forces at kut in Mesopotamia. Jul 1, 1916 • July 1st Start of the battle of somme. Apr 6, 1917 1917- April 6th USA declared war on Germany. Nov 6, 1917 • November 6th the British launched major assault. Dec 5, 1917 • December 5th Armistice between Germany and Russia signed. Mar 21, 1918 1918- March 21st Germany broke through Somme. Jul 15, 1918 July 15th Second battle of Marne defeated germany.